(19)

(11)

EP 0 613 411 A1

(12)

(43) Date of publication: 07.09.1994 Bulletin 1994/36 (21) Application number: 92923601.0 (22) Date of filing: 20.11.1992

(51) International Patent Classification (IPC):  B21J 15/ 32( . ) B25B 23/ 04( . ) F16B 27/ 00( . ) B23P 19/ 00( . ) B25C 1/ 00( . ) (86) International application number: PCT/AU1992/000621 (87) International publication number: WO 1993/009918 (27.05.1993 Gazette 1993/13)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL SE (30) Priority: 20.11.1991 AU 19910009602 13.02.1992 AU 19920000879 22.06.1992 AU 19920000030 (71) Applicant: HENROB LIMITED Flint, Clwyd CH6 5EX (GB)	(72) Inventors: BLACKET, Stuart, Edmund Alderley, QLD 4051 (AU) FUHRMEISTER, Ralph Runcorn, QLD 4113 (AU) (74) Representative: Mock, Hans, et al  MARKS & CLERK, Sussex House, 83-85 Mosley Street Manchester M2 3LG Manchester M2 3LG (GB)